They may have two designated displacements but think of how many different applications they will go into and the HP rating of each. Saves R&D money for after market companies and GM itself..don't forget however, I don't see a written rule that either one of these engines couldn't be supercharged like the LSA or LS9!!

That's what I am hoping for. The LSA and LS9 are a great example of what I am talking about. They are very similar but very different. If that is the approach GM is taking, I don't have a problem with it.